Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:astro-ph/0409112)
· On-line Data
· References in the article
· Citations to the Article (9) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (3)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
An L0 dwarf companion in the brown dwarf desert, at 30 AU
Authors:
Forveille, T.; Ségransan, D.; Delorme, P.; Martín, E. L.; Delfosse, X.; Acosta-Pulido, J. A.; Beuzit, J.-L.; Manchado, A.; Mayor, M.; Perrier, C.; Udry, S.
Affiliation:
AA(Canada-France-Hawaii Telescope Corporation, PO Box 1597, Kamuela, HI 96743, USA ; Laboratoire d'Astrophysique de Grenoble, BP 53, 38041 Grenoble Cedex, France ), AB(Observatoire de Genève, 51 chemin des Maillettes, 1290 Sauverny, Switzerland), AC(Canada-France-Hawaii Telescope Corporation, PO Box 1597, Kamuela, HI 96743, USA), AD(Instituto de Astrofísica de Canarias, C/ Vía Láctea, s/n, 38200 La Laguna (Tenerife), Spain), AE(Laboratoire d'Astrophysique de Grenoble, BP 53, 38041 Grenoble Cedex, France), AF(Instituto de Astrofísica de Canarias, C/ Vía Láctea, s/n, 38200 La Laguna (Tenerife), Spain), AG(Laboratoire d'Astrophysique de Grenoble, BP 53, 38041 Grenoble Cedex, France), AH(Instituto de Astrofísica de Canarias, C/ Vía Láctea, s/n, 38200 La Laguna (Tenerife), Spain), AI(Observatoire de Genève, 51 chemin des Maillettes, 1290 Sauverny, Switzerland), AJ(Laboratoire d'Astrophysique de Grenoble, BP 53, 38041 Grenoble Cedex, France), AK(Laboratoire d'Astrophysique de Grenoble, BP 53, 38041 Grenoble Cedex, France)
Publication:
Astronomy and Astrophysics, v.427, p.L1-L4 (2004) (A&A Homepage)
Publication Date:
11/2004
Origin:
A&A
Astronomy Keywords:
very low mass stars, brown dwarfs, binary stars
DOI:
10.1051/0004-6361:200400069
Bibliographic Code:
2004A&A...427L...1F

Abstract

We present the discovery of an L0 companion to the nearby M1.5 dwarf G 239-25, at a projected distance of 31 AU. It is the faintest companion discovered so far in our adaptive optics survey of all known M dwarfs within 12 pc, and it lies at the stellar/substellar limit. Given the assumed age of the primary star, the companion is likely an extremely low mass star. The long orbital period of G 239-25 AB (≈100 years) precludes a direct mass determination, but the relatively wide angular separation will allow detailed analyses of its near infrared and visible spectra.

Based on observations made at Canada-France-Hawaii Telescope, operated by the National Council of Canada, the Centre National de la Recherche Scientifique de France and the University of Hawaii, at the Observatoire de Haute Provence, operated by the Centre National de la Recherche Scientifique de France and at the William Herschel Telescopes operated by the Isaac Newton Group at the Instituto de Astrofísica de Canarias.

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints